If and until we, as a nation, quit buying everything from somewhere else (China e.g.), then you’ll have to price your product to compete with that labor market. (I once had an eBay merchant fight me for months over an $8 item that I didn’t receive. A Chinese friend explained that the $8 meant a lot to their finances.)
The only (and that’s iffy) market that really makes good money is custom work where you can apply all of the aforementioned formulas to determine a price. Even then there will be some haggling to come to a mutual solution.